12

µPD43256B

Write Cycle (1/2)

≥ 4.5 V

µPD43256B-85

Parameter

Symbol

µPD43256B-70

µPD43256B-A85/A10/A12

Unit

Condition

µPD43256B-B10/B12/B15

MIN.

MAX.

MIN.

MAX.

Write cycle time

70

85

ns

CS to end of write

50

70

ns

Address valid to end of write

50

70

ns

Write pulse width

55

60

ns

Data valid to end of write

30

35

ns

Data hold time

00

ns

Address setup time

00

ns

Write recovery time

00

ns

WE to output in high impedance

30

30

ns

Note

Output active from end of write

10

10

ns

Note See the output load shown in Figure 2 except for

µPD43256B-A, 43256B-B.

Remark These AC characteristics are in common regardless of package types and L, LL versions.

Write Cycle (2/2)

≥ 3.0 V

≥ 2.7 V

Parameter

Symbol

MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX. MIN. MAX.

Write cycle time

85

100

120

100

120

150

ns

CS to end of write

70

70

90

70

90

100

ns

Address valid to end of write

70

70

90

70

90

100

ns

Write pulse width

60

60

80

60

80

90

ns

Data valid to end of write

60

60

70

60

70

80

ns

Data hold time

00

0

0

0

0

ns

Address setup time

00

0

0

0

0

ns

Write recovery time

00

0

0

0

0

ns

WE to output in high impedance

30

35

40

35

40

50

ns

Note

Output active from end of write

10

10

10

10

10

10

ns

Note Loading condition is 1TTL + 100 pF.

Remark These AC characteristics are in common regardless of package types and L, LL versions.

Con-

dition